text: 'use strict';
  
  process.stdin.resume();
  process.stdin.setEncoding('utf-8');
  
  let inputString = '';
  let currentLine = 0;
  
  process.stdin.on('data', inputStdin => {
      inputString += inputStdin;
  });
  
  process.stdin.on('end', _ => {
      inputString = inputString.trim().split('\n').map(string => {
          return string.trim();
      });
      
      main();    
  });
  
  function readLine() {
      return inputString[currentLine++];
  }
  
  function regexVar() {
      const re = /^(Mr?s|[MDE]r)\.[A-Za-z]+$/;
      return re;
  }
  
  
  function main() {
      const re = regexVar();
      const s = readLine();
      
      console.log(!!s.match(re));
  }
  